import {Injectable} from '@angular/core';
import {AppConfig} from '../config';
import {Headers, Http} from '@angular/http';
import {ModelParamValue} from '../entity/model-Param-value';
import {InterceptorService} from './interceptor/interceptor-service';

@Injectable()
export class ModelParamValueService {
  private param: string = 'modelParamValues';

  private get url(): string {
    return `${AppConfig.APP_RESTFUL}/${this.param}`;
  }

  constructor(private http: InterceptorService) {
  }

  create(modelParam: ModelParamValue): Promise<ModelParamValue> {
    return this.http.post(this.url, JSON.stringify(modelParam))
      .toPromise()
      .then(res => {
        try {
          let result = res;
          switch (result.code) {
            case '200':
              return result.data as ModelParamValue;
            case '-1':
              throw new Error(result.message);
          }
        }
        catch (error) {
          this.handleError(error);
        }
      })
      .catch(this.handleError);
  }

  update(modelParam: ModelParamValue): Promise<ModelParamValue> {
    return this.http.put(this.url, JSON.stringify(modelParam))
      .toPromise()
      .then(() => ModelParamValue)
      .catch(this.handleError);
  }

  delete(id: number): Promise<void> {
    const url = `${this.url}/${id}`;
    return this.http.delete(url)
      .toPromise()
      .then(() => null)
      .catch(this.handleError);
  }

  batchDelete(valueIds: number[]): Promise<boolean> {
    const apiUrl = `${this.url}?items=${valueIds}`;
    return this.http.delete(apiUrl)
      .toPromise()
      .then(response => {
        try {
          let result = response;
          switch (result.code) {
            case '200':
              return true;
            case '-1':
              throw new Error(result.message);
          }
        }
        catch (error) {
          throw error;
        }

      })
      .catch(this.handleError);
  }

  private handleError(error: any): Promise<any> {
    // console.error('An error occurred', error); // for demo purposes only
    return Promise.reject(error.message || error);
  }
}


// WEBPACK FOOTER //
// ./src/app/service/model-param-value.service.ts
